Practice Problems

Problem of the Day: Integer Square Root — keep your streak alive!

Practice Problems

#ProblemTopicsDifficulty
728 Remove a Perfect Power dp games 1800
735 The Centroid dp trees 1800
744 Walks on a Triangle combinatorics matrix-exponentiation 1800
745 Strings with an Even Number of Zeros combinatorics matrix-exponentiation 1800
753 Remove Three, Four, or Five dp games 1800
754 Remove an Even Number dp games 1800
755 Remove One or a Perfect Square dp games 1800
795 Walks on a Pentagon graphs matrix-exponentiation 1800
796 Walks on K4 graphs matrix-exponentiation 1800
797 Walks on a Path of 6 graphs matrix-exponentiation 1800
798 Walks on a Star graphs matrix-exponentiation 1800
799 Walks on a Cube graphs matrix-exponentiation 1800
816 Longest Stable Window sliding-window deque 1800
834 Closed Walks on Square Cycle graphs matrix-exponentiation 1800
835 Closed Walks on Hexagon graphs matrix-exponentiation 1800
836 Closed Walks on Path of Four graphs matrix-exponentiation 1800
837 Closed Walks on Path of Five graphs matrix-exponentiation 1800
839 Closed Walks on K5 graphs matrix-exponentiation 1800
840 Closed Walks on Wheel W4 graphs matrix-exponentiation 1800
841 Closed Walks on Wheel W5 graphs matrix-exponentiation 1800
842 Closed Walks on Bipartite K33 graphs matrix-exponentiation 1800
880 Closed Walks on Heptagon graphs matrix-exponentiation 1800
881 Closed Walks on Octagon graphs matrix-exponentiation 1800
882 Closed Walks on Path of Seven graphs matrix-exponentiation 1800
883 Closed Walks on 2x3 Grid graphs matrix-exponentiation 1800
884 Closed Walks on Bowtie graphs matrix-exponentiation 1800
889 Subtraction Game {1,2,3} game-theory grundy 1800
890 Subtraction Game {1,3,5} game-theory grundy 1800
891 Subtraction Game {2,4,6} game-theory grundy 1800
892 Subtraction Game {1,2,4} game-theory grundy 1800
893 Subtraction Game {2,3,6} game-theory grundy 1800
894 Subtraction Game {1,4} game-theory grundy 1800
895 Subtraction Game {2,5} game-theory grundy 1800
896 Subtraction Game {1,3,7} game-theory grundy 1800
969 Closed Walks on Path of Three graphs matrix-exponentiation 1800
972 Closed Walks on Wheel W6 graphs matrix-exponentiation 1800
973 Closed Walks on Star S5 graphs matrix-exponentiation 1800
974 Closed Walks on Triangular Prism graphs matrix-exponentiation 1800
986 Climbing Stairs (1,2,3) dp matrix-exponentiation 1800
1005 Closed Walks on Nonagon graphs matrix-exponentiation 1800
1006 Closed Walks on Decagon graphs matrix-exponentiation 1800
1007 Closed Walks on Path of Eight graphs matrix-exponentiation 1800
1008 Closed Walks on K6 graphs matrix-exponentiation 1800
1009 Closed Walks on Wheel W7 graphs matrix-exponentiation 1800
518 Components over Time union-find 1850
519 Still Two Teams? graphs union-find 1850
521 When Did We Meet binary-search union-find offline 1850
256 Largest Rectangle in a Histogram stack 1900
511 The K-th One, Under Fire binary-search fenwick 1900
512 Leftmost Big Enough segment-tree 1900